X-ray heating from primordial black holes assumed to seed high-redshift AGNs shallows the global 21-cm absorption signal and suppresses its power amplitude at cosmic dawn, with strong dependence on the PBH mass function.
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New F200W-dropout candidates in CEERS include three massive dusty dwarfs at 2<z<3 and five sources with bimodal redshift PDFs favoring either z>15 or z<1.5 extreme dust.
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Impact of Primordial Black Hole population on 21 cm observables at high redshift
X-ray heating from primordial black holes assumed to seed high-redshift AGNs shallows the global 21-cm absorption signal and suppresses its power amplitude at cosmic dawn, with strong dependence on the PBH mass function.
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Ultra High-Redshift or Closer-by, Dust-Obscured Galaxies? Deciphering the Nature of Faint, Previously Missed F200W-Dropouts in CEERS
New F200W-dropout candidates in CEERS include three massive dusty dwarfs at 2<z<3 and five sources with bimodal redshift PDFs favoring either z>15 or z<1.5 extreme dust.